Insttlatiito material



l. A. SCHARWATH.

INSULATING'MATERIAL.

APPLICATION Furn IAN. 15. 191e.

l 9 3 l 3,46 3 Patented Oct. 14, 1919.

/22 lz/lili A TTOHNEV accompanying `r nrc.

Specification of Letters Patent.

Patented Oct. 1a, 1919.

Application mea January 15, 1916. serial' No. 72,197.

To all whom t may concern.'

Be it known that I, JOHN A. SCHARWATH, a citizen of the United States of America, and a resident of Elizabeth, county of Union, and State of New Jersey, have invented cer-- tain new and useful Improvements in Insulating Materials, of which the following 1s a specification, reference being had to the drawings, forming a part thereof.

My invention relates to materials for 1nsulating against the transfer of heat and has special reference to such as is adapted for use in a conduit or similar structure for the protection of steam and hotwater pipesnor of pipes containing refrigerating liqu1ds against the transfer of heat from or to the pipes.

` One object of my invention is to provide a relatively inexpensive and eliicient heat insulating material that shall be impervious to or uninjured by moisture and which shall be capable of resisting heat at vrelatively high temperatures without injury.

Other objects (and advantages of my invention will be set forth hereinafter, and in order that my invention maybe thoroughly understood I will now proceed to describe the same inthe following specification, and then point out the novel features thereof in appended' claims. n

Referring to the drawings:

Figure 1 1s a transverse elevationof a conduit, a part of which has a lling of an insulating material which is made according to and is an embodiment of my invention.

Fig. 2 is a sectional elevation on a larger scale of one of the particles of the novel insulating material.

The conduit illustrated is particularly adapted for-use under ground, to provide a protective casingl for pipes transmitting steam, hot water, or refrigerated liquids, or infact any Huid which it is desired to maintain at 'a temperature either greater or less than the temperature of the surrounding earth.

. As clearly shown in Fig. 2, the conduitjs built up of hollow bricks or tiles, which eX- tend longitudinally and have one or more longitudinally extending holes or pockets. At the bottom ofthe conduit are corner tiles or bricks 1'1 and 12 and intermediate tiles 13 and 14. The number of intermediate tiles will of course depend ,on the size of the conduit. The side walls are built up on the corlized within the combinations ner bricks l1 and 15-17 and 16-18. tiles 19 and 20'and and 22.

Obviously the number of tiles interposed between the corners may be increased indefinitely depending upon the size of the tile or bricks of which the conduit is constructed. Each of the bottom row.- of bricks 11, 12, 13 and 14C is provided with a transverse web 23 which divides the opening into a lower chamber 24 and an upper chamber 25. Some of the chambers in the hollow bricks or tiles are lled with insulating material indicated atl 26.

It will be observed that thel conduit and insulating particularly arranged and adapted for the protection of steam pipes and the like, since special provision is made in every case against the corroding influence of moisture. The bricks 15, 16, 1.7 and 18`constituting the sidewalls are provided with lateral projection's 32-33 which extend inwardly and constitute notched brackets which form supports in whichshort lengths of indicated at 35,

12, and comprise tiles At the top arecorner intermediate tiles21 may be supported in a transverseposition and constitute rollers or hangers for steam pipes 36 be carried in the conduit.

If ordinary insulatingfmaterials are uticonduit to fill in the space between the-pipes and conduit, they are likely to absorb moisture.` This feature has been particularly troublesome hitherto when steam heating pipes were laid in conduits and were only utilized for transmitting steam during a few months of the year, the insulating material or filler around the pipe, such as, for example, mineral wool, magnesia, asbestos ber, infusorial of these materials, by reason porous nature would absorb and quantity of moisture and act in effect like a wet sponge held against the piping. Thus the pipes were rapidly corroded and -destroyed during the summer months, and, furthermore, the insulation was rendered practically valueless.

If insulating material, such as cork, for example, is employed in order to avoid the aforesaid diliiculties, on account of moisture, a new factor of trouble is introduced on account of the fact that the cork is charred or whatever may of their hold a large by the heat and rendered hydroscopic and subject 'to the same' dilculty.

materials of my invention a're pipe or rod,

earth, or

According to-my present invention I prefer to utilize 'Within the conduit directly surrounding the steam pipes, for example, a quantity of small insulating bodies a0, which may for example, correspond in size to pea coal, each body consisting of a small piece of cork 41 of irregular-shape having an envelop or coating 42 of concrete and plaster for example, heat protective coating. the cork is enabled to resist relatively high temperatures even though the thickness of the envelop or coating 1s comparatively` smallf-f for eX- ample. These coated bodies which have the appearance of small pebbles are lled into the space 1n the conduit around the pipes.

and by reason of this lA mass of small solid bodies as above of broken insulation each having a coatingl or j acket of cement formed thereon.

2. An insulating granular mass consisting of small non-adhering bodies or particles of broken cork, each having a coating or jacket of cement ormedthereon.

ln witness whereof l have hereunto set my hand this 12th day of January, 1916.

V JOHN A; SCHARWATH. 

